Chapters 19,20,22

Which of the following are functions of lymphoid tissue? house and provide a proliferation site for lymphocytes house and provide a proliferation site for macrophages furnish an ideal surveillance vantage point for lymphocytes and macrophages a and c

A and C

Area where efferent lymphatic vessels leave the lymph node.

Hilus

The appendix, tonsils, and Peyer's patches are ________. MALT lacteals lymph collecting structures. not parts of the lymphatic system

MALT

Isolated clusters of lymph follicles found in the wall of the small intestine.

Peyer's patches

Part of MALT

Peyer's patches

Receives lymph from most of the body.

Thoracic duct

Which statement best describes arteries? all carry oxygenated blood to the heart. all carry blood away from the heart. all contain valves to prevent the backflow of blood. only large arteries are lined with endothelium.

all carry blood away from the heart

Fenestrated capillaries: are not more permeable than continuous capillaries. are not common in endocrine organs. do not occur in the glomerular capillaries of the kidneys. are not found in the brain.

are not found in the brain

The arteries that directly feed into the capillary beds are called: muscular arteries. elastic arteries. arterioles. venules.

arterioles

The steepest drop in blood pressure occurs in the: capillaries. venules. arterioles. veins.

arterioles

When tissues are inflamed, lymphatic capillaries develop openings that permit uptake of: small particles pathogens cancer cells. b and c.

b and c

Capillary hydrostatic pressure is also known as: blood pressure. interstitial hydrostatic pressure lymphatic hydrostatic pressure. net osmotic pressure.

blood pressure

Permitting the exchange of nutrients and gases between the blood and tissue cells is the primary function of: arterioles. arteries. veins. capillaries.

capillaries

Which of the following is not a method that maintains lymph flow? skeletal muscle contraction breathing valves in lymph vessel walls capillary smooth muscle contraction

capillary smooth muscle contraction

The thymus is most active during: fetal development. childhood. adulthood. old age.

childhood

Lymph collecting from the lower extremities would be delivered to this area first before moving on up. thoracic duct inguinal nodes cisterna chyli azygos

cisterna chyli

Functions of the spleen include all of those below except: removal of old or defective red blood cells. contains crypts that trap bacteria. storage area for blood platelets. storage area of iron.

contains crypts that trap bacteria

Tonsils have blind-ended structures called ________. Tonsils have blind-ended structures called ________. crypts pits traps pitchers

crypts

Lymph leaves a lymph node via: efferent lymphatic vessels. afferent lymphatic vessels. the cortical sinus. the subscapular sinus.

efferent lymphatic vessels

Which of the following is not one of the main factors influencing blood pressure? cardiac output. peripheral resistance. emotional state. blood volume.

emotional state

If more fluid is present in tissue spaces (e.g. edema) solutes: enter cells more rapidly. remain in interstitial fluid. enter cells more slowly. remain in the blood.

enter cells more slowly

What is the function of a Hassall's corpuscle? increases the surface area of the thymic cortex. assists in the production of lymphocytes. forms the blood-thymus barrier. has no known significant function.

has no known significant function

Arteriosclerosis results in: greater arterial elasticity. lower blood pressure. vasodialation. higher blood pressure.

higher blood pressure

An accumulation of new fatty tissue would cause: increased blood pressure. decreased cardiac output. decreased blood pressure. hypotension.

increased blood pressure

Which of the following best reflects the relationship between blood pressure and peripheral resistance? decreased resistance results in increased blood pressure. increased resistance results in increased blood pressure. decreased resistance results in decreased blood pressure. increased resistance results in decreased blood pressure.

increased resistance results in increased blood pressure.

Which of the following would result in increased periperal resistance? increased blood vessel diameter. decreased blood viscosity. increased total vessel length. decreased red blood cell concentration.

increased total vessel length.

Upon vasoconstriction resistance to flow is _________ and pressure __________. increased/lowers. decreased/rises. increased/rises. decreased/lowers..

increased/rises.

Peripheral resistance: decreases with increasing length of the blood vessel. increases as blood vessel diameter increases. increases as blood viscosity increases. is not a major factor in blood pressure in healthy individuals

increases as blood viscosity increases

A buboe is a(n): wall in a lymph node lobe of the spleen infected Peyer's patch infected lymph node

infected lymph node

In the dynamics of blood flow through capillaries, hydrostatic pressure: does not play a role. is the same as capillary blood pressure. generally forces fluid from the interstitial space into the capillaries. is completely canceled out by osmotic pressure.

is the same as capillary blood pressure.

Digestive tract-associated lymphatic tissue includes all of the following except: Peyer's patches. palatine tonsils. lingual tonsils. islets of Langerhans.

islets of Langerhans

Highly specialized lymph capillaries called ________ are present in the villi of the intestinal mucosa. nodules ductal trunks lacteals

lacteals

The larger the vessel diameter the: greater its length. greater the resistance. shorter its length. less the resistance.

less the resistance

The tonsils located at the base of the tongue are the: The tonsils located at the base of the tongue are the: lingual tonsils. palatine tonsils. pharyngeal tonsils. Peyer's tonsils.

lingual tonsils.

Particularly large clusters of lymph nodes occur in all of the following locations except the: inguinal region. cervical region. axillary region. lower extremities.

lower extermities

Protein-containing fluid within lymphatic vessels.

lymph

Small organs intimately associated with lymphatic vessels.

lymph nodes

Which cells become immunocompetent due to thymic hormones? basophils lymphocytes macrophages monocytes

lymphocytes

The outer cortex of a lymph node contains: erythrocytes. leukocytes. lymphocytes. dense irregular connective tissue.

lymphocytes.

Select the correct statement about lymphoid tissue. once a lymphocyte enters the lymphoid tissue, it resides there permanently. lymphoid macrophages secrete antibodies into the blood. lymphoid tissue is predominantly reticular connective tissue. T lymphocytes act by ingesting foreign substances

lymphoid tissue is predominantly reticular connective tissue.

The lymphatic capillaries are: more permeable than blood capillaries. less permeable than blood capillaries. equally permeable to blood capillaries. completely impermeable.

most permeable than blood capillaries

The arteries that are also called distributing arteries are the: elastic arteries. muscular arteries. arterioles. capillaries.

muscular arteries

Which of the following would be most affected by sympathetic nervous system stimulation. veins. arterioles. elastic arteries. muscular arteries.

muscular arteries

Which of the following is not a vasoconstrictive substance? nitroglycerin. angiotensin II. norepinephrine. vasopressin.

nitroglycerin

Metabolic carbon dioxide waste is removed by: vascular shunting. closing feeder arterioles. opening precapillary sphincters. closing precapillary sphincters.

opening pre capillary sphincters

Which of the following would not be classified as a lymphatic organ? pancreas. spleen. tonsils. Peyer's patches of the intestine

pancreas

Antibodies that act against a particular foreign substance are produced by: T lymphocytes. plasma cells. lymph nodes. medullary cords.

plasma cells

When adequate nutrients are present in a tissue area: shunting is inhibited. precapillary sphincters are closed. drainage venules are closed. precapillary sphincters are relaxed.

precapillary sphincters are closed.

At low blood pH: precapillary sphincters open. vascular smooth muscle is relaxed. precapillary sphincters close. acid is retained in capillary bed.

precapillary sphincters open

Which of the following cannot freely diffuse across endothelial cell membranes? lipid solube carbon dioxide. oxygen. proteins.

proteins

Which of the following is not a normal component of lymph? water plasma proteins red blood cells ions

red blood cells

Excessive loss of water due to dehydration would cause an initial: reduction of blood pressure. hypertension. increase in blood pressure. no change in blood volume.

reduction of blood pressure

The soft connective tissue in the spleen is called: dense regular connective tissue. dense irregular connective tissue. loose connective tissue. reticular connective tissue.

reticular connective tissue

Which lymphatic structure drains lymph from the right upper limb and the right side of the head and thorax? lumbar trunk. thoracic duct. right lymphatic duct. cisterna chyli.

right lymphatic duct

Autoregulation involves: sympathetic stimulation of drainage venules. autonomic control of post-capillary sphincters. self-regulation of blood delivery to tissue. CNS control of tissue blood delivery.

self-regulation of blood delivery to tissue.

Both lymph and venous blood flow are heavily dependent on: the pumping action of the heart. skeletal muscle contractions. contraction of the vessels themselves. ability of lymph to leave the lymphatic vessels.

skeletal muscle contractions

Largest lymphatic organ

spleen

Stores blood platelets

spleen

Which is not a mucosa-associated lymphatic tissue? tonsil. thymus. Peyer's patch. appendix.

thymus

A ring of lymphoid tissue that appears as a swelling of the mucosa in the oral cavity is called a(n): tonsil. thymus. Peyer's patch. appendix.

tonsil.

The ________ are the simplest lymphoid organs and are found at the entrance to the pharynx. Peyer's patches tonsils MALT cisternae chyli

tonsils

Functions of the lymphatic system include: Functions of the lymphatic system include: transport of excess interstial fluid to the blood vascular system. transport of red blood cells to the blood vascular system. maintenance of blood pressure in the venous circulation. excretion of excess dietary fat.

transport of excess interstial fluid to the blood vascular system.

Which of the following is the point of nutrient exchange between tissue cells and blood? vascular shunt. feeder arteriole. true capillary. drainage venule.

true capillary

Lymphatic ________ are formed from the union of the largest collecting vessels. capillaries collecting vessels trunks nodules

trunks

Which of the following contains loosely connected collagen fibers that serves to protect the blood vessel? tunica intima. tunica media. tunica interna. tunica adventitia.

tunica adventitia

Which tunic of an artery contains endothelium? tunica interna. tunica media. tunica externa. tunica adventitia.

tunica interna

Which tunic of an artery is most responsible for maintaining blood pressure and continuous blood circulation? tunica intima. tunica media. tunica externa. tunica adventitia.

tunica media

Which of the following is subjected to the least amount of pressure? arterioles. arteries. venules. capillaries.

venules